The following CMS tools allow you the ability to backup multiple versions of each page, each of which can be activated to live content with a simple click. 

For example, if you are planning to make major changes to a page, click on the "Backup Now" before you make any changes.  Then, if by chance, you are not happy with the changes or have published something that just isn't right; you may reload the page using the Page Restore ability.

The grapic below, is the Backup/Restore panel from the maintenance page.

The Backup Now button on the left creates a copy of what currently exists on the website into a dated slot in saved pages database.  Every time you add backup page, the dropdown on the right which displays the available pages to be restored will have the current backup date/time added to the list of available pages.

This function is also handy if you have two pages that you wish to swap between.  For example, a sale at your store, special events, vacation messages, etc.

Similarly, CMS tools for backup, recovery, and version control also exist for all the META title, description, and keywords.  Easily switch titles, descriptions, etc. for both recovery or to fine tune your SEO efforts, or implement your latest advertising campaign.